Method for measurement of convergence of a three-gun...

Details Method for measurement of convergence of a three-gun... Method for measurement of convergence of a three-gun...

H - Electricity

04

N

316/3

H04N 17/04 (2006.01) H01J 9/42 (2006.01)

Patent

CA 1241692

-33- ABSTRACT OF THE DISCLOSURE Monochrome bar patterns approximately seven millimeters in width are produced on the screen of a three-color television picture tube by means of a video signal having a substantially Gaussian waveform. The value of the convergence component is given by the distance between centers of two bars of different colors. Measurement of convergence is carried out by means of a photosensor consisting of a charge-coupled photosensitive strip and an optical system comprising a biconvex lens and a cylindrical lens.

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